[PATCH v3 1/5] dt-bindings: nvmem: Add bindings for rmem driver
From: Nicolas Saenz Julienne <hidden>
Date: 2021-01-12 14:24:57
Also in:
linux-arm-kernel, lkml
Subsystem:
nvmem framework, open firmware and flattened device tree bindings, the rest · Maintainers:
Srinivas Kandagatla, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Firmware/co-processors might use reserved memory areas in order to pass data stemming from an nvmem device otherwise non accessible to Linux. For example an EEPROM memory only physically accessible to firmware, or data only accessible early at boot time. Introduce the dt-bindings to nvmem's rmem. Signed-off-by: Nicolas Saenz Julienne <redacted> --- Changes since v2: - Run yamllint and fix indentation issues Changes since v1: - Update schema to new driver design .../devicetree/bindings/nvmem/rmem.yaml | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/rmem.yaml
diff --git a/Documentation/devicetree/bindings/nvmem/rmem.yaml b/Documentation/devicetree/bindings/nvmem/rmem.yaml
new file mode 100644
index 000000000000..1d85a0a30846
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/rmem.yaml@@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/rmem.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Reserved Memory Based nvmem Device + +maintainers: + - Nicolas Saenz Julienne <nsaenzjulienne@suse.de> + +allOf: + - $ref: "nvmem.yaml#" + +properties: + compatible: + items: + - enum: + - raspberrypi,bootloader-config + - const: nvmem-rmem + + no-map: + $ref: /schemas/types.yaml#/definitions/flag + description: + Avoid creating a virtual mapping of the region as part of the OS' + standard mapping of system memory. + +required: + - compatible + - no-map + +unevaluatedProperties: false + +examples: + - | + reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + + blconfig: nvram@10000000 { + compatible = "raspberrypi,bootloader-config", "nvmem-rmem"; + #address-cells = <1>; + #size-cells = <1>; + reg = <0x10000000 0x1000>; + no-map; + }; + }; + +...
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2.29.2